429 lines
11 KiB
Plaintext
429 lines
11 KiB
Plaintext
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#!/bin/bash
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## Manage linux driver patches for netmap.
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## usage (from the dir containing the Makefile):
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##
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## scripts/np <action> [args...]
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##
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## where <action> is any of the functions below.
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##
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[ -f scripts/conf ] && source scripts/conf
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## The following enviroment variables must be set:
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##
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## GITDIR: the absolute path of the netmap linux
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## git repository, containing all the required netmap-*
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## branches.
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[ -n "$GITDIR" -a -d "$GITDIR/.git" ] || {
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echo "GITDIR not set or not valid" >&2
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exit 1
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}
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NETMAP_BRANCH=${NETMAP_BRANCH:-master}
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function error {
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echo "$@" >&2
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exit 1
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}
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function get-params {
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local params=$1; shift
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err_msg="$PROGNAME $COMMAND $(echo $params| perl -pe 's/\S+/<$&>/g')"
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local param
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for param in $params; do
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[[ -z "$@" ]] && error "$err_msg"
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pname=$(echo -n $param | perl -pe 's/\W/_/g')
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eval $pname="$1"
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shift
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done
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[[ -n "$@" ]] && error "$err_msg"
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}
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##
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## LINUX_SOURCES: the absolute path of a
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## directory used to store all required linux-* source trees
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## (The script will extract linux-x.y.z from GITDIR if it needs
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## it and $LINUX_SOURCES does not already contain it).
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##
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## LINUX_CONFIGS: the absolute path of a
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## directory containing the configuration files for
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## the linux kernel. The file for version x must be named
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## config-x. config-all can be used as a default.
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##
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## The configuration variables can be put in scripts/conf.
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##
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##
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## Available actions:
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##
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##
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## driver-path <driver> <version>
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## retrieves the path of <driver> in the linux sources
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## for version <version>. The path is output to stdout.
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## It uses a local cache to minimize the expensive
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## file system search.
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function driver-path()
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{
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get-params "driver version" "$@"
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cat cache/$version/$driver/path 2>/dev/null && return
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local kern=$(get-kernel $version)
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mkdir -p cache/$version/$driver
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(
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cd $kern
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find drivers/net -name $driver
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) | tee cache/$version/$driver/path
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}
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##
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## get-patch [-c] <driver> <version>
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## extract the netmap patch for the given <driver> and the
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## given kernel <version>. The patch is stored in tmp-patches
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## and the name of the patch is output to stdout.
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## If a patch with the same name already exists in tmp-patches
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## it is overwritten, unless the -c option is used,
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## in which case the existing patch is kept (the patch name is still output).
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function get-patch()
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{
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local use_cache
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[ "$1" = -c ] && { use_cache=1; shift; }
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get-params "driver version" "$@"
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# convert kernel version to fixed notation
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local v1=$(scripts/vers $version -c)
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# compute next kernel version (in fixed notation)
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local v2=$(scripts/vers $version -i -c)
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local patchname=diff--$driver--$v1--$v2
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local out=tmp-patches/$patchname
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[ -n "$use_cache" -a -s $out ] && { echo $out; return; }
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local drvpath=$(driver-path $driver $version)
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[ -n "$drvpath" ] || return
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local drvdir=$(dirname $drvpath)
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(
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cd $GITDIR
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git diff --relative=$drvdir v$version..netmap-$version -- $drvpath
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) > $out
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# an empty patch means no netmap support for this driver
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[ -s $out ] || { rm $out; return 1; }
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echo $out
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return 0;
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}
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##
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## get-range <driver> <version1> <version2>
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## extracts the netmap patches for the given <driver> for
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## all the kernel versions from <version1> (included) to
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## <version2> (excluded). All patches are stored in tmp-patches
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## and their names are output to stdout.
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function get-range()
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{
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get-params "driver version1 version2" "$@"
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local v=$version1
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# while version is less than $version2
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while scripts/vers -b $v $version2 -L; do
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get-patch $driver $v
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# compute next version
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v=$(scripts/vers $v -i)
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done
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}
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##
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## get-src <driver> <version> <dest>
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## copies the original sources of the given <driver>,
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## from the given kernel <version> to the given <dest>
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## directory.
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## It uses a local cache to minimize the expensive
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## checkouts in GITDIR.
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function get-src()
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{
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get-params "driver version dest" "$@"
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local kern=$(get-kernel $version)
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local src=$(driver-path $driver $version)
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cp -r $kern/$src $dest
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}
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##
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## extend <patch> <version>
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## checks wether the range of applicability of the
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## given <patch> can be extented to include <version>.
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## It returns 0 on success and 1 on failure.
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function extend()
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{
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get-params "patch version" "$@"
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local _patch=$(realpath $patch)
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# extract the driver name from the patch name
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local driver=$(scripts/vers $_patch -s -p -p)
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local tmpdir1=$(mktemp -d)
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local tmpdir2=$(mktemp -d)
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trap "rm -rf $tmpdir1 $tmpdir2" 0
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# we get the driver sources for the given <version> and
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# we apply two patches separately:
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# i) the given <patch>;
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# ii) the proper patch from GITDIR.
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# We declare <patch> to be extendable if
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# - it is still applicable AND
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# - we obtain the same files from i) and ii) (ignoring whitespace)
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get-src $driver $version $tmpdir1
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get-src $driver $version $tmpdir2
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(
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cd $tmpdir1
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patch --no-backup-if-mismatch -p1 < $_patch >/dev/null 2>&1
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) || return 1
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local patch2=$(get-patch -c $driver $version)
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patch2=$(realpath $patch2)
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(
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cd $tmpdir2
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patch -p1 < $patch2 >/dev/null 2>&1
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) # this will certainly apply
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diff -qbBr $tmpdir1 $tmpdir2 >/dev/null || return 1
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return 0
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}
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##
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## minimize <driver>
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## tries to minimize the number of patch files for the given
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## <driver>. It uses the patches currently found in tmp-patches
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## and stores the resulting patches in final-patches.
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## If final-patches already contained patches for <driver>,
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## they are deleted first.
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function minimize()
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{
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get-params "driver" "$@"
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mkdir -p final-patches
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local drv=$(basename $driver)
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local patches=$(ls tmp-patches/diff--$drv--* 2>/dev/null)
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[ -n "$patches" ] || return 1
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# put the patch names in $1, $2, ...
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set $patches
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rm -f final-patches/diff--$drv--*
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# the original patches (in tmp-patches) are ordered by version number.
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# We consider one patch in turn (the 'pivot') and try
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# to extend its range to cover the range of the next
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# patch. If this succedes, the merged patch is the new
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# pivot, otherwise the current pivot is output and the
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# next patch becomes the new pivot. The process
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# is repeated until there are no more patches to consider.
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local pivot=$1
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[ -n "$pivot" -a -e "$pivot" ] || return 1
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# extract the left end and right end of the pivot's range
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local ple=$(scripts/vers $pivot -s -p -C)
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local pre=$(scripts/vers $pivot -s -C)
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while [ -n "$pivot" ]; do
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shift
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if [ -n "$1" ]; then
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# extract the left end and right end of the next patch
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local nle=$(scripts/vers $1 -s -p -C)
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local nre=$(scripts/vers $1 -s -C)
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# we admit no gaps in the range
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if [ $pre = $nle ] && extend $pivot $nle; then
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pre=$nre
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continue
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fi
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fi
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# either out of patches or failed merge.
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# Compute the file name of the current pivot and store
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# the patch in its final location
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out=$(scripts/vers diff $drv $ple -c $pre -c -S4)
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cp $pivot final-patches/$out
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# the new pivot becames the next patch (if any)
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pivot=$1
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pre=$nre
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ple=$nle
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done
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return 0
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}
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##
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## infty <driver> <version>
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## if final-patches contains a patch for <driver> with a range
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## ending in <version>, extend it to infinity.
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## Do nothing otherwise.
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function infty()
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{
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get-params "driver version" "$@"
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local drv=$(basename $driver)
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# convert kernel version to fixed notation
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local v=$(scripts/vers $version -c)
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local last=$(ls final-patches/diff--$drv--*--$v 2>/dev/null|tail -n1)
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[ -n "$last" ] || return 1
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mv -n $last $(scripts/vers $last -s -p 99999 -S4) 2>/dev/null
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}
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function get-kernel()
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{
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get-params "version" "$@"
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local dst="$(realpath $LINUX_SOURCES)/linux-$version"
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[ -d $dst ] && { echo $dst; return; }
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mkdir -p $dst
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(
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cd $GITDIR
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git archive v$v | tar xf - -C $dst
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)
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echo $dst
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}
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##
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## build-prep <version>
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## prepare the linux tree for <version> to be ready
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## for external modules compilation.
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## The tree is put in $LINUX_SOURCES/linux-<version> and the
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## configuration is obtained from $LINUX_CONFIGS/config-<version>
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## (or $LINUX_CONFIGS/config-all by default).
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## Errors are logged to $LINUX_CONFIGS/linux-<version>.log.
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## If $LINUX_SOURCES/linux-<version> already exists,
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## nothing is done.
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## In all cases, the absolute path of linux-<version> is
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## output.
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function build-prep()
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{
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get-params "version" "$@"
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local dst=$(get-kernel $version)
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exec 3>&1 4>&2 >$dst.log 2>&1
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cp $LINUX_CONFIGS/config-$v $dst/.config 2>/dev/null ||
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cp $LINUX_CONFIGS/config-all $dst/.config
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(
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cd $dst
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yes '' | make oldconfig
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make modules_prepare
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)
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exec 1>&3 2>&4
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echo $dst
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}
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##
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## check-patch <patch>
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## check that the given <patch> applies and compiles without
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## error for all its declared range of applicability.
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## Errors are logged to log/<patch>.
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function check-patch()
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{
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get-params "patch" "$@"
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# extract the left version
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local v1=$(scripts/vers $patch -s -p -C)
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# extract the right version
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local v2=$(scripts/vers $patch -s -C)
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# extract the driver name
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local driver=$(scripts/vers $patch -s -p -p)
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local p=$(realpath $patch)
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mkdir -p log
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local log="$(realpath log)/$(basename $patch)"
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local nmcommit=$(cd ..; git show-ref -s heads/$NETMAP_BRANCH)
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echo -n $patch...
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while scripts/vers -b $v1 $v2 -L; do
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# cache lookup
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local cache=cache/$v1/$driver
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local cpatch=$cache/patch
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local cnmcommit=$cache/nmcommit
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local cstatus=$cache/status
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local clog=$cache/log
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if [ -f $cpatch ] &&
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cmp -s $cpatch $patch &&
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[ "$nmcommit" = "$(cat $cnmcommit)" ]; then
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cp $clog $log
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ok=$(cat $cstatus)
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else
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# update cache
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cp $patch $cpatch
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echo $nmcommit > $cnmcommit
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local ksrc=$(build-prep $v1)
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local tmpdir=$(mktemp -d)
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trap "rm -rf $tmpdir" 0
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(cd ..; git archive $NETMAP_BRANCH | tar xf - -C $tmpdir )
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pushd $tmpdir/LINUX >/dev/null
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mkdir single-patch
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rm patches
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ln -s single-patch patches
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cp $p single-patch
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ok=false
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make KSRC=$ksrc >$log 2>&1 && ok=true
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popd >/dev/null
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cp $log $clog
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fi
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[ $ok = true ] || { echo FAILED; echo false > $cstatus; return 1; }
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echo true > $cstatus
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rm -rf $tmpdir
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# compute next version
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v1=$(scripts/vers $v1 -i)
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done
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echo OK
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}
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##
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## build-check <driver>
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## do a check-patch for all the patches of <driver> that are
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|
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## currently in tmp-patches. Patches that fail the check
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## are moved to failed-patches.
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function build-check()
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{
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get-params "driver" "$@"
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|
||
|
|
mkdir -p failed-patches
|
||
|
|
local drv=$(basename $driver)
|
||
|
|
local patches=$(ls tmp-patches/diff--$drv--* 2>/dev/null)
|
||
|
|
local p
|
||
|
|
for p in $patches; do
|
||
|
|
check-patch $p || mv $p failed-patches
|
||
|
|
done
|
||
|
|
}
|
||
|
|
|
||
|
|
##
|
||
|
|
## forall <cmd> [args...]
|
||
|
|
## exec <cmd> <driver> [args...] for all known drivers.
|
||
|
|
function forall()
|
||
|
|
{
|
||
|
|
local cmd=$1
|
||
|
|
shift
|
||
|
|
# we obtain the value of DRIVER_SRC from the makefile
|
||
|
|
# (the +% target is defined in our Makefile and prints
|
||
|
|
# the contents of variable %)
|
||
|
|
local driver_srcs=$(make +DRIVER_SRCS)
|
||
|
|
|
||
|
|
local driver
|
||
|
|
for driver in $driver_srcs; do
|
||
|
|
$cmd $(basename $driver) "$@"
|
||
|
|
done
|
||
|
|
}
|
||
|
|
|
||
|
|
mkdir -p tmp-patches
|
||
|
|
|
||
|
|
PROGNAME=$0
|
||
|
|
|
||
|
|
[ -n "$1" ] || {
|
||
|
|
scripts/help $PROGNAME;
|
||
|
|
exit 1
|
||
|
|
}
|
||
|
|
|
||
|
|
COMMAND=$1; shift
|
||
|
|
case $COMMAND in
|
||
|
|
*-all)
|
||
|
|
forall ${COMMAND%-all} "$@"
|
||
|
|
;;
|
||
|
|
-[hH]|--help|-help|help)
|
||
|
|
scripts/help $PROGNAME
|
||
|
|
;;
|
||
|
|
*)
|
||
|
|
$COMMAND "$@"
|
||
|
|
;;
|
||
|
|
esac
|